The rule in which any male wears an earring in his right ear is deemed 'gay' or 'homosexual'. If they have one in their left ear too, they are not gay, but more expressing their feminine side
Jimmy: Hey dude, you think that Carl follows the Right Earring Rule?

Johnny: Of course not! He only has a piercing in his right ear, he is so totally gay.
by jAsOn'S dElI69 May 1, 2011